In message <[email protected]>,
Risto Vaarandi writes:
>I have finished working on the new input buffering scheme which allows
>for using separate input buffers for each input source (plus a separate
>buffer for synthetic events). The old one-buffer-for-all scheme is also
>present in the code, and the work mode can be changed with --jointbuf
>and --nojointbuf options. This added functionality will make multiple
>line patterns much more useful, and would also make event rewriting more
>powerful.
>
>I've now started to think how the rewriting can actually be done. A
>separate rule is one option, but my personal preference lies with a
>special 'rewrite' or 'replace' action (an action would allow for
>rewriting from any rule type). With an action, there are several
>implementation avenues:
>
>1) rewrite <somestring> -- if <somestring> is made up of N lines, the
>action will replace last N lines in the input buffer with <somestring>.
>
>2) rewrite <amount> <somestring> -- <amount> specifies the number of
>lines which need rewriting. If <somestring> contains more than <amount>
>lines, only first <amount> lines are written; if <somestring> has lesser
>amount of lines, leading empty lines will be added.
I am not sure if this is better, but you could require the use of
regexpN/substrN
to match/replace more than one line.
type = single
ptype = regexp4
pattern = ...
action = rewrite ,new $1 $6 %a value,
would rewrite 4 lines in the buffer to a single line. Also I often have a
sequence
of lines whose length is unknown beforehand. I currently create a new event
from the contents of a context and put the event on the event stream. Ideally
I would like to replace all the events from the start event to the end
event with my single line event, but I don't have a count of the number of
lines.
I'm not sure that's a solvable problem.
--
-- rouilj
John Rouillard
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